Schedule II Schedule II (STATEMENTS OF OPERATIONS - Parent Company Only) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended									12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014		Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Equity in net income of subsidiaries and affiliates										$ 231	$ 119	$ 80
Net realized gains (losses)	(210)	(120)	(73)	(104)		154	40	104	206	(507)	504	78
Total revenues	4,737	5,200	4,815	4,419		5,074	5,172	4,705	4,310	19,171	19,261	17,936
Administrative and other (income) expense										(2,245)	(2,211)	(2,096)
Income tax expense (benefit)										634	480	270
Total expenses										(15,684)	(15,023)	(14,960)
Net income	555	785	779	734	[1]	998	916	891	953	2,853	3,758	2,706
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest										2,892	2,023	3,682
Parent Company Only
Condensed Financial Statements, Captions [Line Items]
Investment income, including intercompany interest income										37	34	34
Equity in net income of subsidiaries and affiliates										2,707	3,580	2,590
Net realized gains (losses)										0	0	17
Total revenues										2,744	3,614	2,641
Administrative and other (income) expense										(123)	(161)	(75)
Income tax expense (benefit)										14	17	10
Total expenses										(109)	(144)	(65)
Net income										2,853	3,758	2,706
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest										$ 2,892	$ 2,023	$ 3,682

[1] (1) Net income for the three months ended December 31, 2014 includes $89 million of net charges related to income taxes to correct prior periods. Such amounts are not material to any period presented.